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Tolerance, acceptance and compliance with the dietary regimen and bowel preparation regimen as assessed by a questionairre and food diary. The questionnaire contains questions about compliance with the bowel preparation regimen, medication use and some co-morbid conditions. It also contains questions with visual analogue scale responses in order to assess tolerance to the bowel preparation regimen. It has not previously been validated.2972360

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Reason:

Timepoint:

Questionnaire administered on the day of colonoscopy, prior to the procedure

Food diary completed over the 24 hours prior to the colonoscopy2972360

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Secondary Outcome:

Factors other than dietary allocation that affect bowel preparation quality such as a history of constipation, laxative use, opioid use, body mass index, diagnosis of diabetes mellitus2972370

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As assessed by the questionnaire administered on the day of colonoscopy, prior to the procedure2972370

History of phenylketonuria (PKU) or Glucose-6-Phosphate Dehydrogenase (G6PD) deficiency and any person with a known hypersensitivity to a constituent of Movicol (Registered Trademark).

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Study type

Interventional

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Purpose of the study

Diagnosis

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Allocation to intervention

Randomised controlled trial

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Describe the procedure for enrolling a subject and allocating the treatment (allocation concealment procedures)

Persons who require an outpatient colonoscopy will be invited to participate. Participants will be randomly allocated to one of the dietary regimens on a 1:1 basis. This will be done via the opening of a sealed opaque envelope at the time that the colonoscopy is booked to an endosocopy list

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Describe the methods used to generate the sequence in which subjects will be randomised (sequence generation)

For a successful colonoscopy, good views of the bowel lining are essential. Ideally, a bowel cleansing preparation should be effective at cleaning out the bowel but should also be well tolerated with minimal abdominal discomfort, nausea or other adverse symptoms.

Historically, oral intake on the day prior to colonoscopy has been limited to clear fluids alone - without food. Rather than a restriction to clear fluids, a low-residue diet may also result in good quality bowel preparation.

This research project is aiming to determine whether there is any difference in the bowel cleansing quality or how well it is tolerated (such as the degree of hunger, nausea, interference with daily activities) between a standard dietary restriction to clear fluids and a low-residue diet (one that contains few indigestible components) on the day prior to colonoscopy.